Office 365 backup failure
I've just bought an Acronis True Image 2020 Premium subscription.
Backing up a small test selection of files and folders from my computer seem to work fine.
But I also want to back up my Office 365 Personal account, including OneDrive and my mailbox.
So I configure a new backup for Office 365 in the Online Dashboard, allow Acronis access to my Office 365 account, and leave the backup options on the defaults.
First backup attempt runs for a while and backs up the mailbox (it's very small, just a few MB), but then errors on OneDrive with:
"Cannot back up the contents of '/foldername/foldername/foldername/filename.ext': '[Archive Server]: insufficient storage'".
At this point my "Storage Status" still shows all of 1024 GB free.
Afterwards I deleted and recreated the backup a few times, and even uninstalled and reinstalled Acronis True Image 2020 while I couldn't think of anything else to try. No luck, but the backup fails quite quickly now and the error message is now slightly different:
"Cannot open or create backup file 'my_username@hotmail_com_OneDrive_d301f097874e33efb8fb4f368c318f71_8cf4dfd6-bf95-4c90-b190-a7da90d55791_0A'. [Archive Server]: insufficient storage".
I've opened a support case, never heard back, tried online webchat, provided some requested logs and so forth, and haven't heard back, so I'm wondering if the community could perhaps assist.